CVE-2026-29647

EUVD-2026-23960
In OpenXiangShan NEMU, insufficient Smstateen permission enforcement allows lower-privileged code to access IMSIC state via stopei/vstopei CSRs even when mstateen0.IMSIC is cleared, potentially enabling cross-context information leakage or disruption of interrupt handling.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 10%
Common Weakness Enumeration
References
https://docs.riscv.org/reference/isa/priv/smstateen.html#state-enable-0-registers
https://github.com/OpenXiangShan/NEMU/issues/691
https://github.com/OpenXiangShan/XiangShan/pull/3978
https://github.com/OpenXiangShan/NEMU/issues/691